var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var cors = require('cors');
var { expressjwt: jwt } = require("express-jwt");

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var gwhRouter = require('./routes/gwh')

var app = express();
// 导入密钥
var secretKey = require('./cipher/key');

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(cors());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/upload', express.static(path.join(__dirname, 'upload')));

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/gwh',gwhRouter)

// 接口是否验证请求头
app.use(jwt({
  secret: secretKey,   // secret: 当时生成token的密钥
  algorithms: ["HS256"], // 当时生成token的加密算法，默认就是HS256 不需要改
}).unless({
  path: ["/login", { url: "/register", method: "post" }, /^\/upload$/, /^\/public$/]
}));

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  // res.locals.message = err.message;
  // res.locals.error = req.app.get('env') === 'development' ? err : {};

  // // render the error page
  // res.status(err.status || 500);
  res.render('error');
    // 错误对象中的name为:UnauthorizedError,那么就意味着token错误
    if (err.name == "UnauthorizedError") {
      res.send({
        code: 401,
        msg: 'token无效或未登录'
      })
    } else {
      res.send({
        msg: '其它未知错误',
        err,
        code: err.status
      })
    }
});

module.exports = app;
